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发明公开
CN102570361A 一种特高压直流穿墙套管及其屏蔽结构 有权

一种特高压直流穿墙套管及其屏蔽结构
摘要：
本发明涉及一种特高压直流穿墙套管及其屏蔽结构，该屏蔽结构包括同轴套设的内屏蔽筒和外屏蔽筒，外屏蔽筒的一端的开口为喇叭状开口，喇叭状开口的边沿具有环形翻沿，喇叭状的开口的小端的外周上固定有环形固定板；内屏蔽筒的外周上固定有喇叭状套筒，喇叭状套筒的边沿也具有环形翻沿；屏蔽结构还包括轴向设置的支撑柱，支撑柱一端固定在环形固定板上，另一端固定在喇叭状套管的边沿上。在使用时，绝缘棒的一端被外屏蔽筒的喇叭状开口的环形翻沿包裹，另一端被喇叭状套筒的环形翻沿包裹，因此由于绝缘棒与屏蔽筒的连接结构均处于环形屏蔽结构之内，从而避免了绝缘棒与屏蔽筒的连接结构影响穿墙套筒内电场分布的问题。
摘要（英）：

The invention relates to an ultrahigh voltage direct current wall bushing and a shielding structure thereof. The shielding structure comprises an inner shielding barrel and an outer shielding barrel, which are coaxially sleeved. A trumpet-shaped opening is formed in one end of the outer shielding barrel, and is provided with an annular overturned edge. An annular fixed plate is fixed on the periphery of the small end of the trumpet-shaped opening. A trumpet-shaped sleeve is fixed on the periphery of the inner shielding barrel, and is also provided with an annular overturned edge. The shielding structure also comprises an axially arranged support pillar, wherein one end of the support pillar is fixed on the annular fixed plate, and the other end of the support pillar is fixed at the edge of the trumpet-shaped sleeve. When the shielding structure is used, one end of an insulating rod is wrapped by the annular overturned edge of the trumpet-shaped opening of the outer shielding barrel, the other end of the insulating rod is wrapped by the annular overturned edge of the trumpet-shaped sleeve, and then the connected structures of the insulating rod and the shielding barrels are positioned in the annular shielding structure, so that the problem of influence of the connected structures of the insulating rod and the shielding barrels on the distribution of an electric field in the wall bushing is solved.

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